Closure for receptacles



y 1, 1956 M. M. STERNAU 2,756,921

CLOSURE FOR RECEPTACLES Filed May 21, 1952 FIG. I.

INVENTOR MARTIN M. $TERNAU DEZSOE STEINHERZ ATTORNEY.

United States Patent CLOSURE FOR RECEPTACLES Martin M. Sternau, Flushing, N. Y.

Application May '21, 1952, Serial No. 289,032

2 Claims. (Cl. 229-43) This invention relates to closures for receptacles and it has particular relation to new and improved closures adapted to be used in combination with paper receptacles and other receptacles having 'a beaded upper lip, said closure covering and enclosing the lip of said receptacles.

The main object of the present invention is to provide a closure of the beforementioned type having a rolled rim, which can be conveniently packaged in stacks and can be easily and simply converted before use into a cover adapted to accommodate the beaded rim of containers, to cover said rim in sanitary manner.

Another object of the invention is to provide a unitary, onewpiece cover which can be readily applied to containers and is self-locking when applied to a container having a beaded upper marginal edge.

It is also an object of the invention to provide a cover or closure which can be easily :and economically manufactured and shipped.

Other objects and the advantages of the invention will be apparent from the appended claims and drawings and the following specification which describes, by way of example and without limitation, some embodiments of the invention.

In the enclosed drawings,

. Figure 1 illustrates a paper blank adapted to be used for the manufacture of closures embodying the invent-ion;

Figure 2 illustrates a product made of the paper blank shown in Fig. 1 and having its wall section drawn into pleats;

Figure 3 shows the product illustrated in Fig. 2, afiter it has been provided with a rolled rim and a peripheral crease;

Figure 4 is a vertical sectional view of the closure shown in 'Figure 3;

Figure 5 illustrates the closure according to the invention, ready for use;

Figure 6 illustrates the closure applied to a paper container, and

Figure 7 illustrates a stack of the closures assembled for shipping.

Referring now to the drawings in detail, Figure l illustrates a blank 1 consisting of flexible fibrous material, preferably paper which may be treated to render it resistant to heat and moisture. The outer peripheral portion of this blank is bent to an integral flange or wall section generally indicated by reference numeral 6, which is drawn into pleats 8 and is provided with a peripheral crease 10, and an outwardly rolled rim 7. These steps are carried out in conventional manner. As shown in Figure 4, the closure generally denoted 4 has a height denoted hi, an inner diameter d1 at its top portion and a somewhat larger inner diameter d3 at its lower edge provided with rolled 7. Peripheral crease 10 is provided preferably at a height of approximately h1/2.

2,756,921 Patented July 31, 1956 'If the closure shown in Figure 4 is placed on a plane surface, and pressure is exerted on top portion '5 of closure 4 in the direction of arrow 9, the closure will assume the shape illustrated in Figure 5, i. e. in the presence of pleats 8 and peripheral crease 10, under the action of said pressure the closure is deformed and :a peripheral bulge 12 is formed in predetermined manner to conform with the beaded rim of the receptacle. After application of pressure, the inner diameter at the level of crease 10 will be d2, which is larger than ds, and the height of the closure will be smaller, as shown at ha in Figure 5. The presence of pleats and of the peripheral crease in the flange of the closure is indispensable in obtaining this deforming effect.

The closure illustrated in Figure 5, which can be provided with an indentation '11 in order to render the cover more rigid, can be easily applied to receptacles of paper or other materials, as shown in Figure 6. The latter illustrates a conventional paper receptacle 3, provided with a beaded lip 2. The cover is applied to receptacle 3 by pressing it down on the top whereby lip 2 becomes positioned in the registering portion of the closure, which then frictionally engages the closure and seals off the receptacle from the atmosphere at the same time protecting the rim of the receptacle in sanitary manner. The cover can be removed by exerting a force on rolled rim 7. Diameter d3 is made slightly smaller than the diameter of the beaded outsiderim of the container in order to be locked in position when applied to the mouth of the container.

' Figure 7 shows that the closures embodying the present invention can be assembled to a compact package which requires less space in shipping than other closures of conventional type.

What is claimed is:

1. A'single piece closure of substantially circular shape, for receptacles having .a beaded upper lip, said closure consisting of a flexible, moldablc material and comprising a circular top portion, and an integral peripheral flange which is drawn into pleats and has a substantially conical shape; the mouth of the closure being rolled outwardly into a rim; the inner diameter of the closure at the level of said rim being slightly larger than its inner diameter on the top; said flange being provided with an outwardly projecting indentation extending in a direction substantially parallel with said top portion, substantially mid-way of the flange, in order to render the closure capable of being deformed by applying pressure to its top portion in a direction substantially perpendicular to said top portion, causing the closure to form an outwardly extending peripheral bulge, whereby the diameter at the level of the indentation is increased and the height of the closure is decreased.

2. A closure as claimed in claim 1, consisting of paper.

References Cited in the file of this patent UNITED STATES PATENTS 1,016,390 Beadle Feb. 6,1912 2,141,833 Young Dec. 27,1938 2,233,489 Reifsnyder Mar. 4, 1941 2,383,290 Carew Aug. 21, 1945 2,493,086 Reifsnyder Jan. 3,1950 2,497,870 Dennis Feb. 21, 1950 FOREIGN PATENTS 653,873 Great Britain May 30, 1951 

